ci: stop installing FUSE headers nothing links against (#10840)

Four workflows ran apt to install libfuse3-dev before every FUSE job. Nothing
needs it: go-fuse implements the protocol in pure Go, no cgo in the tree
references fuse, and the package does not even provide the fusermount3 the
mount actually execs - fuse3 does, and it is already on the runner image, which
is why the setuid-repair step finds it.

So the step downloaded a dev package to build against headers no compiler ever
opened, and it is the step that has been hanging whenever the Ubuntu mirror
goes slow. Configuring /etc/fuse.conf is all that is left.

.github/workflows/fuse-dlm-integration.yml

@@ -40,10 +40,11 @@ jobs:
         with:
           go-version-file: 'go.mod'
 
-      - name: Install FUSE dependencies
+      - name: Configure FUSE
         run: |
-          sudo apt-get update
-          sudo apt-get install -y libfuse3-dev
+          # Nothing to install: fuse3 ships fusermount3 and is pre-installed,
+          # and go-fuse is pure Go, so the libfuse headers were never linked
+          # against.
           echo 'user_allow_other' | sudo tee -a /etc/fuse.conf
           sudo chmod 644 /etc/fuse.conf
 

.github/workflows/fuse-failover.yml

@@ -47,10 +47,11 @@ jobs:
         with:
           go-version-file: 'go.mod'
 
-      - name: Install FUSE dependencies
+      - name: Configure FUSE
         run: |
-          sudo apt-get update
-          sudo apt-get install -y libfuse3-dev
+          # Nothing to install: fuse3 ships fusermount3 and is pre-installed,
+          # and go-fuse is pure Go, so the libfuse headers were never linked
+          # against.
           echo 'user_allow_other' | sudo tee -a /etc/fuse.conf
           sudo chmod 644 /etc/fuse.conf
 

.github/workflows/fuse-integration.yml

@@ -38,12 +38,10 @@ jobs:
       with:
         go-version-file: 'go.mod'
 
-    - name: Install FUSE and dependencies
+    - name: Configure FUSE
       run: |
-        sudo apt-get update
-        # fuse3 is pre-installed on ubuntu-22.04 runners and conflicts
-        # with the legacy fuse package, so only install the dev headers.
-        sudo apt-get install -y libfuse3-dev
+        # Nothing to install: fuse3 ships fusermount3 and is pre-installed, and
+        # go-fuse is pure Go, so the libfuse headers were never linked against.
         # Allow non-root FUSE mounts with allow_other
         echo 'user_allow_other' | sudo tee -a /etc/fuse.conf
         sudo chmod 644 /etc/fuse.conf

.github/workflows/fuse-p2p-integration.yml

@@ -46,10 +46,11 @@ jobs:
         with:
           go-version-file: 'go.mod'
 
-      - name: Install FUSE dependencies
+      - name: Configure FUSE
         run: |
-          sudo apt-get update
-          sudo apt-get install -y libfuse3-dev
+          # Nothing to install: fuse3 ships fusermount3 and is pre-installed,
+          # and go-fuse is pure Go, so the libfuse headers were never linked
+          # against.
           echo 'user_allow_other' | sudo tee -a /etc/fuse.conf
           sudo chmod 644 /etc/fuse.conf